With increasing interest in organogenesis, tissue maintenance and integrity, and the use of zebrafish as a model for human disease, researchers are studying processes that extend further into the larval period. Despite many years of use as a model system an anatomical reference for larval zebrafish does not exist. In order to provide such a resource we developed FishNet an online anatomical reference for zebrafish larval development. Using the technique of optical projection tomography (OPT) (described in Bryson-Richardson and Currie 2004) we have created three- dimensional (3D) models of larval zebrafish from 5 mm to adulthood. Once a 3D model has been created it may be virtually sectioned in any plane or rendered to give a representation of the 3D organization of the sample. [Information of the supplier]